通过对５５例健康志愿者的胸主动脉ＭＲＩ检查、１２０例正常人的胸部ＣＴ扫描，并与５０例高血压患者的胸主动脉ＣＴ扫描进行对照、比较，研究、确定了中国人胸主动脉不同平面的正常值范围及性别、年龄、体重和胸椎体大小与胸主动脉管径的关系，观察了高血压时胸主动脉管径的变化。笔者认为健康人胸主动脉管径随年龄增大而增宽；ＭＲＩ所测各径线与ＣＴ相近（Ｐ＞０．０５）；年龄、体重、胸椎体大小均与胸主动脉管径正相关（Ｐ＜０．０１）；高血压患者的胸主动脉管径大于同年龄段健康受检者的管径。 Thirty-five healthy volunteers underwent thoracic aorta MRI examination and chest CT scan of 120 normal people, and compared with 50 cases of hypertensive patients thoracic aorta CT scan, compared to determine the Chinese thoracic aorta The normal range of different planes and the relationship between gender, age, body weight and thoracic vertebral body diameter and the diameter of thoracic aorta were observed. The changes of thoracic aorta diameter were observed. In my opinion, the diameter of thoracic aorta of healthy people widened with age; the diameter of each artery measured by MRI was close to that of CT (P> 0.05); age, body weight, (P <0.01). The diameter of thoracic aorta in hypertensive patients was larger than the diameter of healthy subjects in the same age group.